Caterpillar Fault Code

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5246-15

90-Minute Derate Timer

System

Aftertreatment

Symptom

90-Minute Derate Timer

Diagnosis & fix steps

LOGIC: SCR Operator Inducement (Least Severe). ACTION: Refill DEF/AdBlue tank and verify the level sensor signal is responding in ET.

Red Seal field insights

Logic: A "countdown" code. If not resolved, the machine will eventually lock into a 5 mph crawl mode.

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